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authorAaron LI <aly@aaronly.me>2017-12-07 20:24:26 +0800
committerAaron LI <aly@aaronly.me>2017-12-07 20:24:26 +0800
commitba470446cd814492b03762caa130aac4241763ec (patch)
tree2ff10dce80d8f0c34821d7ac74c9c63607fb495e
parent75b2f56efcabd75d2f39089049075993dd3fd9f3 (diff)
downloadatoolbox-ba470446cd814492b03762caa130aac4241763ec.tar.bz2
Add unix/freebsd-memory.pl
-rw-r--r--unix/freebsd-memory.pl120
1 files changed, 120 insertions, 0 deletions
diff --git a/unix/freebsd-memory.pl b/unix/freebsd-memory.pl
new file mode 100644
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--- /dev/null
+++ b/unix/freebsd-memory.pl
@@ -0,0 +1,120 @@
+#!/usr/bin/env perl
+##
+## freebsd-memory -- List Total System Memory Usage
+## Copyright (c) 2003-2004 Ralf S. Engelschall <rse@engelschall.com>
+##
+## Redistribution and use in source and binary forms, with or without
+## modification, are permitted provided that the following conditions
+## are met:
+## 1. Redistributions of source code must retain the above copyright
+## notice, this list of conditions and the following disclaimer.
+## 2. Redistributions in binary form must reproduce the above copyright
+## notice, this list of conditions and the following disclaimer in the
+## documentation and/or other materials provided with the distribution.
+##
+## THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+## ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+## IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+## ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
+## FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+## DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+## OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+## HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+## LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+## OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+## SUCH DAMAGE.
+##
+
+# query the system through the generic sysctl(8) interface
+# (this does not require special priviledges)
+my $sysctl = {};
+my $sysctl_output = `/sbin/sysctl -a`;
+foreach my $line (split(/\n/, $sysctl_output)) {
+ if ($line =~ m/^([^:]+):\s+(.+)\s*$/s) {
+ $sysctl->{$1} = $2;
+ }
+}
+
+# round the physical memory size to the next power of two which is
+# reasonable for memory cards. We do this by first determining the
+# guessed memory card size under the assumption that usual computer
+# hardware has an average of a maximally eight memory cards installed
+# and those are usually of equal size.
+sub mem_rounded {
+ my ($mem_size) = @_;
+ my $chip_size = 1;
+ my $chip_guess = ($mem_size / 8) - 1;
+ while ($chip_guess != 0) {
+ $chip_guess >>= 1;
+ $chip_size <<= 1;
+ }
+ my $mem_round = (int($mem_size / $chip_size) + 1) * $chip_size;
+ return $mem_round;
+}
+
+# determine the individual known information
+# NOTICE: forget hw.usermem, it is just (hw.physmem - vm.stats.vm.v_wire_count).
+# NOTICE: forget vm.stats.misc.zero_page_count, it is just the subset of
+# vm.stats.vm.v_free_count which is already pre-zeroed.
+my $mem_hw = &mem_rounded($sysctl->{"hw.physmem"});
+my $mem_phys = $sysctl->{"hw.physmem"};
+my $mem_all = $sysctl->{"vm.stats.vm.v_page_count"} * $sysctl->{"hw.pagesize"};
+my $mem_wire = $sysctl->{"vm.stats.vm.v_wire_count"} * $sysctl->{"hw.pagesize"};
+my $mem_active = $sysctl->{"vm.stats.vm.v_active_count"} * $sysctl->{"hw.pagesize"};
+my $mem_inactive = $sysctl->{"vm.stats.vm.v_inactive_count"} * $sysctl->{"hw.pagesize"};
+my $mem_cache = $sysctl->{"vm.stats.vm.v_cache_count"} * $sysctl->{"hw.pagesize"};
+my $mem_free = $sysctl->{"vm.stats.vm.v_free_count"} * $sysctl->{"hw.pagesize"};
+
+# determine the individual unknown information
+my $mem_gap_vm = $mem_all - ($mem_wire + $mem_active + $mem_inactive + $mem_cache + $mem_free);
+my $mem_gap_sys = $mem_phys - $mem_all;
+my $mem_gap_hw = $mem_hw - $mem_phys;
+
+# determine logical summary information
+my $mem_total = $mem_hw;
+my $mem_avail = $mem_inactive + $mem_cache + $mem_free;
+my $mem_used = $mem_total - $mem_avail;
+
+# information annotations
+my $info = {
+ "mem_wire" => 'Wired: disabled for paging out',
+ "mem_active" => 'Active: recently referenced',
+ "mem_inactive" => 'Inactive: recently not referenced',
+ "mem_cache" => 'Cached: almost avail. for allocation',
+ "mem_free" => 'Free: fully available for allocation',
+ "mem_gap_vm" => 'Memory gap: UNKNOWN',
+ "mem_all" => 'Total real memory managed',
+ "mem_gap_sys" => 'Memory gap: Kernel?!',
+ "mem_phys" => 'Total real memory available',
+ "mem_gap_hw" => 'Memory gap: Segment Mappings?!',
+ "mem_hw" => 'Total real memory installed',
+ "mem_used" => 'Logically used memory',
+ "mem_avail" => 'Logically available memory',
+ "mem_total" => 'Logically total memory',
+};
+
+# print system results
+printf("SYSTEM MEMORY INFORMATION:\n");
+printf("mem_wire: %12d (%7dMB) [%3d%%] %s\n", $mem_wire, $mem_wire / (1024*1024), ($mem_wire / $mem_all) * 100, $info->{"mem_wire"});
+printf("mem_active: + %12d (%7dMB) [%3d%%] %s\n", $mem_active, $mem_active / (1024*1024), ($mem_active / $mem_all) * 100, $info->{"mem_active"});
+printf("mem_inactive:+ %12d (%7dMB) [%3d%%] %s\n", $mem_inactive, $mem_inactive / (1024*1024), ($mem_inactive / $mem_all) * 100, $info->{"mem_inactive"});
+printf("mem_cache: + %12d (%7dMB) [%3d%%] %s\n", $mem_cache, $mem_cache / (1024*1024), ($mem_cache / $mem_all) * 100, $info->{"mem_cache"});
+printf("mem_free: + %12d (%7dMB) [%3d%%] %s\n", $mem_free, $mem_free / (1024*1024), ($mem_free / $mem_all) * 100, $info->{"mem_free"});
+printf("mem_gap_vm: + %12d (%7dMB) [%3d%%] %s\n", $mem_gap_vm, $mem_gap_vm / (1024*1024), ($mem_gap_vm / $mem_all) * 100, $info->{"mem_gap_vm"});
+printf("-------------- ------------ ----------- ------\n");
+printf("mem_all: = %12d (%7dMB) [100%%] %s\n", $mem_all, $mem_all / (1024*1024), $info->{"mem_all"});
+printf("mem_gap_sys: + %12d (%7dMB) %s\n", $mem_gap_sys, $mem_gap_sys / (1024*1024), $info->{"mem_gap_sys"});
+printf("-------------- ------------ -----------\n");
+printf("mem_phys: = %12d (%7dMB) %s\n", $mem_phys, $mem_phys / (1024*1024), $info->{"mem_phys"});
+printf("mem_gap_hw: + %12d (%7dMB) %s\n", $mem_gap_hw, $mem_gap_hw / (1024*1024), $info->{"mem_gap_hw"});
+printf("-------------- ------------ -----------\n");
+printf("mem_hw: = %12d (%7dMB) %s\n", $mem_hw, $mem_hw / (1024*1024), $info->{"mem_hw"});
+
+# print logical results
+printf("\n");
+printf("SYSTEM MEMORY SUMMARY:\n");
+printf("mem_used: %12d (%7dMB) [%3d%%] %s\n", $mem_used, $mem_used / (1024*1024), ($mem_used / $mem_total) * 100, $info->{"mem_used"});
+printf("mem_avail: + %12d (%7dMB) [%3d%%] %s\n", $mem_avail, $mem_avail / (1024*1024), ($mem_avail / $mem_total) * 100, $info->{"mem_avail"});
+printf("-------------- ------------ ----------- ------\n");
+printf("mem_total: = %12d (%7dMB) [100%%] %s\n", $mem_total, $mem_total / (1024*1024), $info->{"mem_total"});
+